# SDR 2001UALA00982

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 8, 2001
- Submitted: June 27, 2001
- Operation: Air carrier
- Aircraft: N349UA
- Make and model: Boeing 737322
- Aircraft serial: 24253
- Aircraft time: 39,695 hours, 21,098 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Valve
- Part number: 3964421
- Part serial: 1680
- Condition: Failed
- Location: Cabin Pressure
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2001UALA00982

## Discrepancy

UNSCHEDULED LANDING.  UNABLE TO MAINTAIN CABIN PRESSURE.  *S/D*  FAILED LEFT FLOW CONTROL VALVE AND A LOOSE APU PNEUMATIC DUCT CLAMP.  SECURED LOOSE APU DUCT CLAMP, THEN REPLACED FAILED FLOW CONTROL VALVE.

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